Preferences-headers中的简单文本块

Question

<preference-headers xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- What do I have to paste here? -->

    <header
        android:fragment="com.example.ASettings$GeneralPreferenceFragment"
        android:icon="@drawable/ic_info_black_24dp"
        android:title="@string/pref_header_general" />

我想在这里注入多行文字。